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Binary Ferromagnetic Nanostructures: Fabrication, Static and Dynamic Properties

Authors

  • Junjia Ding,

    1. Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, 117576, Singapore
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  • Adekunle O. Adeyeye

    Corresponding author
    1. Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, 117576, Singapore
    • Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, 117576, Singapore.
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Abstract

The fabrication of large area binary magnetic nanostructures made from one or two ferromagnetic materials (Ni and Ni80Fe20) is reported using self-aligned shadow deposition technique. The static and dynamic properties are characterized using magneto-optical Kerr effects (MOKE) and broadband ferromagnetic resonance spectroscopy. Compared with Ni80Fe20 nanomagnets made using a conventional lithographic technique from identical resist templates, tunable magnetization switching is observed with a marked increase in the coercive field and more adjustable dynamic response for the Ni80Fe20/Ni80Fe20 and Ni/Ni80Fe20 binary structures. The results are validated by direct domain imaging using magnetic force microscopy and micromagnetic simulations.

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